Fillings are usually painless, and the main ways of filling are filling treatment, medication, and laser treatment. The first one is filling treatment, that is, after finding the worm tooth or usually speaking caries, it is necessary to clean the decaying residue and food inside the worm tooth including the decayed tooth by tools and treatment instruments, after cleaning, then use the modulated filling material, such as glass ion, resin material, etc., to fill the cavity in order to complete and restore to the normal shape of the tooth, and there is usually no pain in this process; the second one is The second type is medication, which is usually applied to the superficial defect with fluoride medication to prevent and control worm teeth, and it is easier for the child to accept during the treatment, because the fluoride treatment is only for the superficial caries, so it is necessary to go to the hospital for review once every six months or 3-6 months. In the case of poor oral hygiene of children, it is easy to recur, so children are required to go to the hospital to receive the second fluoride treatment after 3-6 months; the third type of laser caries prevention, because it is a painless and non-irritating treatment, so children are also easier to accept.